1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
|
#!/usr/bin/env perl
use strict;
use warnings;
use File::Basename;
use lib dirname (__FILE__);
use TestUtils;
use TestHTTPD;
use File::Temp;
sub checked_system {
my $result = system(@_);
if ($result == -1) {
die "@_ failed to execute: $!\n";
} elsif ($result & 127) {
printf STDERR "@_ died with signal %d, %s coredump\n", ($result & 127), ($result & 128) ? 'with' : 'without';
exit 255;
} elsif ($result >> 8) {
exit $result >> 8;
}
}
sub make_config($$) {
my $proxy_port = shift;
my $httpd_port = shift;
my ($fh, $filename) = File::Temp::tempfile();
my ($unused, $logfile) = File::Temp::tempfile();
# Write out a test config file
print $fh <<END;
# Minimal test configuration
user root
listen 192.0.2.5 $proxy_port {
proto http
source client
access_log $logfile
}
table {
localhost 192.0.2.2 $httpd_port
}
END
close ($fh);
return $filename;
}
sub proxy {
my $config = shift;
exec('ip', 'netns', 'exec', 'ns-test-proxy', @_, '../src/sniproxy', '-f', '-c', $config);
}
sub exec_cmd {
exec(@_);
}
sub worker($$$$$) {
my ($hostname, $path, $ip, $port, $requests) = @_;
for (my $i = 0; $i < $requests; $i++) {
system('ip', 'netns', 'exec', 'ns-test-clt',
'curl',
'-s', '-S',
'-H', "Host: $hostname",
'-o', '/dev/null',
"http://$ip:$port/$path");
if ($? == -1) {
die "failed to execute: $!\n";
} elsif ($? & 127) {
printf STDERR "child died with signal %d, %s coredump\n", ($? & 127), ($? & 128) ? 'with' : 'without';
exit 255;
} elsif ($? >> 8) {
exit $? >> 8;
}
}
# Success
exit 0;
}
sub main {
my $proxy_port = $ENV{SNI_PROXY_PORT} || 8080;
my $httpd_port = $ENV{TEST_HTTPD_PORT} || 8081;
my $workers = $ENV{WORKERS} || 10;
my $iterations = $ENV{ITERATIONS} || 10;
my $config = make_config($proxy_port, $httpd_port);
unless ($> == 0 and $^O eq 'linux') {
print STDERR "This test requires Linux and root privileges\n";
exit 77;
}
# Setup a test network using network namespaces with the ns-test-proxy
# namespace configured like a normal transparent proxy box.
#
# +-----------------------------------------------------------+
# | Host (default) Network Namespace |
# | |
# | Route 192.0.2.4/30 via 192.0.2.1 dev veth-srv-proxy |
# | |
# | TestHTTPD process o veth-srv-proxy |
# | | 192.0.2.2/30 |
# | +-----------------------------------|---------------+ |
# | | SNIproxy Network Namespace | | |
# | | ns-test-proxy o veth-proxy-srv| |
# | | 192.0.2.1/30 | |
# | | IP Forwarding enabled | |
# | | IPTables and ip rules configured (see below) | |
# | | | |
# | | o veth-proxy-clt| |
# | | sniproxy process | 192.0.2.5/30 | |
# | | | | |
# | +-----------------------------------|---------------+ |
# | | |
# | +-----------------------------------|---------------+ |
# | | Client Network Namespace | veth-clt-proxy| |
# | | ns-test-clt o 192.0.2.6/30 | |
# | | | |
# | | Route default via 192.0.2.5 dev veth-clt-proxy | |
# | | | |
# | | curl process | |
# | | | |
# | +---------------------------------------------------+ |
# | |
# +-----------------------------------------------------------+
#
# IPTables NAT rules:
# Chain POSTROUTING (policy ACCEPT)
# target prot opt source destination
# MASQUERADE all -- 0.0.0.0/0 0.0.0.0/0
#
# IPTables Mangle rules:
# Chain PREROUTING (policy ACCEPT)
# target prot opt source destination
# DIVERT tcp -- 0.0.0.0/0 0.0.0.0/0 socket
#
# Chain DIVERT (1 references)
# target prot opt source destination
# MARK all -- 0.0.0.0/0 0.0.0.0/0 MARK set 0x1
# ACCEPT all -- 0.0.0.0/0 0.0.0.0/0
#
# IP rules:
# 0: from all lookup local
# 32765: from all fwmark 0x1 lookup 100
# 32766: from all lookup main
# 32767: from all lookup default
#
# IP route table 100:
# local default dev lo scope host
checked_system('ip', 'netns', 'add', 'ns-test-proxy');
checked_system('ip', 'netns', 'add', 'ns-test-clt');
checked_system('ip', 'link', 'add', 'veth-proxy-srv', 'type', 'veth', 'peer', 'name', 'veth-srv-proxy');
checked_system('ip', 'link', 'set', 'veth-srv-proxy', 'up');
checked_system('ip', 'addr', 'add', '192.0.2.2/30', 'dev', 'veth-srv-proxy');
checked_system('ip', 'route', 'add', '192.0.2.4/30', 'via', '192.0.2.1', 'dev', 'veth-srv-proxy');
checked_system('ip', 'link', 'set', 'veth-proxy-srv', 'up', 'netns', 'ns-test-proxy');
checked_system('ip', 'netns', 'exec', 'ns-test-proxy', 'ip', 'addr', 'add', '192.0.2.1/30', 'dev', 'veth-proxy-srv');
checked_system('ip', 'link', 'add', 'veth-proxy-clt', 'type', 'veth', 'peer', 'name', 'veth-clt-proxy');
checked_system('ip', 'link', 'set', 'veth-proxy-clt', 'up', 'netns', 'ns-test-proxy');
checked_system('ip', 'netns', 'exec', 'ns-test-proxy', 'ip', 'addr', 'add', '192.0.2.5/30', 'dev', 'veth-proxy-clt');
checked_system('ip', 'netns', 'exec', 'ns-test-proxy', 'sysctl', 'net.ipv4.conf.all.forwarding=1');
checked_system('ip', 'netns', 'exec', 'ns-test-proxy', 'iptables', '-t', 'nat', '-A', 'POSTROUTING', '-o', 'veth-proxy-clt', '-j', 'MASQUERADE');
checked_system('ip', 'netns', 'exec', 'ns-test-proxy', 'iptables', '-t', 'mangle', '-N', 'DIVERT');
checked_system('ip', 'netns', 'exec', 'ns-test-proxy', 'iptables', '-t', 'mangle', '-A', 'PREROUTING', '-p', 'tcp', '-m', 'socket', '-j', 'DIVERT');
checked_system('ip', 'netns', 'exec', 'ns-test-proxy', 'iptables', '-t', 'mangle', '-A', 'DIVERT', '-j', 'MARK', '--set-mark', '1');
checked_system('ip', 'netns', 'exec', 'ns-test-proxy', 'iptables', '-t', 'mangle', '-A', 'DIVERT', '-j', 'ACCEPT');
checked_system('ip', 'netns', 'exec', 'ns-test-proxy', 'ip', 'rule', 'add', 'fwmark', '1', 'lookup', '100');
checked_system('ip', 'netns', 'exec', 'ns-test-proxy', 'ip', 'route', 'add', 'local', '0.0.0.0/0', 'dev', 'lo', 'table', '100');
#checked_system('ip', 'netns', 'exec', 'ns-test-proxy', 'iptables-save');
#checked_system('ip', 'netns', 'exec', 'ns-test-proxy', 'ip', '-d', 'addr', 'show');
#checked_system('ip', 'netns', 'exec', 'ns-test-proxy', 'ip', '-d', 'route', 'show');
checked_system('ip', 'link', 'set', 'veth-clt-proxy', 'up', 'netns', 'ns-test-clt');
checked_system('ip', 'netns', 'exec', 'ns-test-clt', 'ip', 'addr', 'add', '192.0.2.6/30', 'dev', 'veth-clt-proxy');
#checked_system('ip', 'netns', 'exec', 'ns-test-clt', 'ip', '-d', 'addr', 'show');
#checked_system('ip', 'netns', 'exec', 'ns-test-clt', 'ip', '-d', 'route', 'show');
my $proxy_pid = start_child('proxy', \&proxy, $config, @ARGV);
my $httpd_pid = start_child('server', \&TestHTTPD::httpd, ip => '192.0.2.2', port => $httpd_port);
my $tcpdump1_pid = start_child('tcpdump', \&exec_cmd, 'ip', 'netns', 'exec', 'ns-test-proxy', 'tcpdump', '-npi' ,'veth-proxy-clt', '-s', '0', '-w', 'veth-proxy-clt.pcap');
my $tcpdump2_pid = start_child('tcpdump', \&exec_cmd, 'ip', 'netns', 'exec', 'ns-test-proxy', 'tcpdump', '-npi' ,'veth-proxy-srv', '-s', '0', '-w', 'veth-proxy-srv.pcap');
#checked_system('ip', 'netns', 'exec', 'ns-test-proxy', 'ss', '-lptn');
# Wait for proxy to load and parse config
wait_for_port(ip => '192.0.2.2', port => $httpd_port);
wait_for_port(ip => '192.0.2.5', port => $proxy_port);
for (my $i = 0; $i < $workers; $i++) {
start_child('worker', \&worker, 'localhost', '', '192.0.2.5', $proxy_port, $iterations);
}
# Wait for all our children to finish
wait_for_type('worker');
# Give the proxy a second to flush buffers and close server connections
sleep 1;
# Orderly shutdown of the server
kill 15, $proxy_pid;
kill 15, $httpd_pid;
kill 15, $tcpdump1_pid;
kill 15, $tcpdump2_pid;
sleep 1;
# Delete our test configuration
unlink($config);
# Kill off any remaining children
reap_children();
# Cleanup our network name spaces
checked_system('ip', 'netns', 'delete', 'ns-test-clt');
checked_system('ip', 'netns', 'delete', 'ns-test-proxy');
}
main();
|
